I've got a 55g planted community I've had up and running for about a year now as well as a 'bookshelf' 6.6 gallon tank to try my hand at breeding Red Cherry Shrimp. But we all know that's not enough

and I've had the salt bug for months now.
I've come across a "35 gallon acrylic" rectangle with HOB filter, sand, rocks (look either dead or fake in pic, only 2 small pieces) and 2 clown fish, no specific breed or sex mentioned.
I haven't had a chance to go look at it yet to see what condition it's in, etc. Is there anything I should look out for? Is acrylic OK for salt? Any drawbacks to not using glass? Should I look to see if it has a certain type or amount of lighting in the hood? They're asking $300 obo which seems like a good deal for that tank size + stand and a cycled set up.
If I got this tank I'd want to end up adding live rock, a few Zoas, and maybe some inverts like fire shrimp if that adds anything I'd need equipment wise.
Are there any good salt tank books worth picking up?
Thanks in advance!